2023 Lead in Drinking Water Sampling Dashboard

  • Facility Location ID:  More than one sample is collected at each fixture.  This column identifies which samples are related to the same fixture.
  • Sample Types:
        o  Primary Sample (P) – commonly referred to as a first-draw sample, this is the first sample collected after the water has been left stagnant in the system for the required 8-16 hours.  This is representative of the conditions present at the beginning of the day or after periods of infrequent use.
        o   Sequential Sample (S) – This is a sample collected after the first-draw in fixtures, such as water fountains with coolers, to help determine if coolers, storage units or other components are potential sources of lead.
        o   Flush Sample (F) – This is the last sample collected and helps determine if plumbing leading to a fixture is a potential source of lead.
  • Qualifiers:
        o   U – indicates that lead was not detected above the laboratory reporting limit
        o   J – result was below the laboratory reporting limit of 2 ppb (0.002 mg/L) but above the method detection limit of 0.6 ppb (0.0006 mg/L).  This is considered an estimated value.
Lab results are in milligrams per liter (mg/L).  The program action level is 7.5 parts per billion (ppb). 
To convert from mg/L to ppb, use the following example:
0.0075 mg/L multiplied by 1,000 = 7.5 ppb

For Data Prior to 2023 Sampling: Lead In Drinking Water Sampling Results